The entrance to the Edward’s Westminster Mall Cinemas in Westminster, CA looked similar to the box office/entrance area of Tanforan. Both built by UA, but the only two I’ve seen that looked so similar.

You can see a little of the big green number 4 in this picture:
http://www.cinematour.com/picview.php?db=us&id=59800

This is not a picture of the Showplace 3. This is a picture of any number of Century Theatres. Judging by the Carpet it looks like the Century 16 in Union Heights, UT. (Only Century location to receive that carpet).

I was just at this mall tonight and took a picture of the boarded up space where the theatre used to be. After peering through the cracks in the boarding, it looks like the theatre has been partially gutted and is being used for storage.